> PS/2 is NOT a serial port (and if you insist I will post the > relevant specs).
I'd be interested in seeing the specs. I've a book that describes the PS/2 keyboard port hardware, but doesn't go into detail about how it is used, e.g. handshaking on the bidirectional data line, which side generates the clock, etc. Similar information about the Q40 keyboard port would be useful too. Ian. > -----Original Message----- > From: zeljko.nastasic > Sent: 15 November 2001 03:29 > To: ql-users > Cc: zeljko.nastasic > Subject: Re: [ql-users] pointer env ..? > > > On 11/14/01 at 9:37 PM Phoebus R. Dokos wrote: > > > I did use a PS/2 mouse when I had my Aurora/sH :-) It's a standard > > serial port apart from the difference in the packaging > (mini din instead > > of Sub-D9). > > NO!!! This is NOT correct!!! > There are mouses that will work as either PS/2 or serial > using a mini-din > to D9 adapter, but it is NOT the general case. Some mice ONLY > work as PS/2 > and some only as serial. Even universal mice (PS/2 and > Serial) usually use > different pins on the mini-din for serial conenctions. > PS/2 is NOT a serial port (and if you insist I will post the relevant > specs). It is a synchronous port that requires a clock and a > bidirectional > data line, which are all 5V only. The signal spec is the same > as the PC > keyboard, NOT the serial mouse. Connecting a PS/2 only mouse > to a serial > port can damage the mouse. > > > I was thinking it wouldn't work at first but I was influence from > > the PC which uses the PS/2 port as a different kind of serial > > port with its own IRQ and only one baud setting. > > No it's not. It's actually another keyboard port, and is > handled by the > same microcontroller (8042), just using a different interrupt. > > > However from an electrical standpoint its 100% the same :-) > > Not even nearly. > > Nasta > > Visit our website at http://www.ubswarburg.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the contents of this message which arise as a result of e-mail transmission. If verification is required please request a hard-copy version. This message is provided for informational purposes and should not be construed as a solicitation or offer to buy or sell any securities or related financial instruments.
